Explosions reported across Russia, occupied Crimea overnight, including near bomber unit airbase

Editor's note: This is a developing story and is being updated.

Explosions and fires were reported overnight on May 27 across multiple regions in Russia and occupied Crimea, with smoke reportedly visible near a military airfield in the southeastern Russian city of Voronezh.

The military airfield hosts Russia's 47th Guards Bomber Aviation Regiment and is regularly used to launch airstrikes against Ukraine, according to an independent Telegram channel, Astra. Voronezh Oblast borders Ukraine's Kharkiv Oblast and is often used as a launch point for Russia's attacks on the front line, as well as on the city of Kharkiv.

Voronezh Oblast Governor Alexander Gusev said that two "high-speed targets" were allegedly shot down by air defenses, adding that no casualties were reported, though falling debris damaged a tire repair shop and a utility building.

Monitoring channels also reported that an oil refinery in Tuapse, on the Black Sea coast in Russia's southern Krasnodar Krai, was among the targets of the overnight strikes. The Ukrainian military confirmed in May that it struck the Tuapse oil refinery four times this spring.

The facility has been repeatedly targeted in recent months, leading to environmental fallout including airborne petroleum byproducts and oil spills on city streets.

Residents in Taganrog, located in Rostov Oblast, reported blasts and visible smoke across parts of the city, with preliminary reports suggesting a strike and subsequent fire at a facility involved in the maintenance and repair of aviation equipment.

Taganrog sits along southern Russia's Azov Sea coast, located just 40 kilometers (25 miles) from Ukraine's border with Russia.

Separately, Russian-installed authorities in occupied Sevastopol claimed that a bank building caught fire following a Ukrainian attack, allegedly involving Storm Shadow missiles, and that a nearby residential building sustained damage from the blast wave.

The Kyiv Independent could not immediately verify the reports, and Ukraine’s military has not commented on the claims.

Ukraine regularly strikes military infrastructure deep within Russia and occupied territories in an effort to diminish Moscow's capacity to continue waging war on Ukraine.